VirtualBox

Ticket #4635 (new enhancement)

Opened 5 years ago

Allow remapping of parallel port addresses

Reported by: Donuts Owned by:
Priority: minor Component: other
Version: VirtualBox 3.0.2 Keywords: parallel lpt expresscard
Cc: Guest type: other
Host type: Linux

Description

This suggestion is for when VirtualBox properly/offically supports guest access to host parallel port(s).

Some systems cannot have parallel ports which live at the normal/legacy LPT1/2/3 I/O address ranges. It is possible to add hardware parallel ports to such systems, but the port base address is not the normal legacy value. For example, a laptop with no built-in parallel port can be used with a PCI Express-based ExpressCard parallel card. (The PCI Express parallel port cannot live at the legacy LPT1 address range.)

Most well-written software works with such parallel ports, but much older software is hard-coded to only work with the legacy address ranges.

To be able to use such software, VirtualBox needs to remap accesses to the legacy parallel I/O range to that used by the host's parallel port. So in addition to a direct pass-through, an option to set the I/O address range used for the guest's parallel port would be really useful, and should allow use of software which does not work when run in the host OS.

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